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/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
use crate::dom::bindings::cell::{DomRefCell, Ref};
use crate::dom::bindings::codegen::Bindings::GPUBufferBinding::{
self, GPUBufferMethods, GPUBufferSize,
};
use crate::dom::bindings::reflector::{reflect_dom_object, Reflector};
use crate::dom::bindings::root::DomRoot;
use crate::dom::bindings::str::DOMString;
use crate::dom::globalscope::GlobalScope;
use dom_struct::dom_struct;
use std::cell::Cell;
use webgpu::{WebGPU, WebGPUBuffer, WebGPUDevice, WebGPURequest};
#[derive(MallocSizeOf)]
pub enum GPUBufferState {
Mapped,
Unmapped,
Destroyed,
}
#[dom_struct]
pub struct GPUBuffer {
reflector_: Reflector,
#[ignore_malloc_size_of = "channels are hard"]
channel: WebGPU,
label: DomRefCell<Option<DOMString>>,
size: GPUBufferSize,
usage: u32,
state: DomRefCell<GPUBufferState>,
buffer: WebGPUBuffer,
device: WebGPUDevice,
valid: Cell<bool>,
}
impl GPUBuffer {
fn new_inherited(
channel: WebGPU,
buffer: WebGPUBuffer,
device: WebGPUDevice,
state: GPUBufferState,
size: GPUBufferSize,
usage: u32,
valid: bool,
) -> GPUBuffer {
Self {
reflector_: Reflector::new(),
channel,
label: DomRefCell::new(None),
state: DomRefCell::new(state),
size: size,
usage: usage,
valid: Cell::new(valid),
device,
buffer,
}
}
#[allow(unsafe_code)]
pub fn new(
global: &GlobalScope,
channel: WebGPU,
buffer: WebGPUBuffer,
device: WebGPUDevice,
state: GPUBufferState,
size: GPUBufferSize,
usage: u32,
valid: bool,
) -> DomRoot<GPUBuffer> {
reflect_dom_object(
Box::new(GPUBuffer::new_inherited(
channel, buffer, device, state, size, usage, valid,
)),
global,
GPUBufferBinding::Wrap,
)
}
}
impl GPUBuffer {
pub fn id(&self) -> WebGPUBuffer {
self.buffer
}
pub fn size(&self) -> GPUBufferSize {
self.size
}
pub fn usage(&self) -> u32 {
self.usage
}
pub fn state(&self) -> Ref<GPUBufferState> {
self.state.borrow()
}
}
impl Drop for GPUBuffer {
fn drop(&mut self) {
self.Destroy()
}
}
impl GPUBufferMethods for GPUBuffer {
/// https://gpuweb.github.io/gpuweb/#dom-gpubuffer-unmap
fn Unmap(&self) {
self.channel
.0
.send(WebGPURequest::UnmapBuffer(self.buffer))
.unwrap();
*self.state.borrow_mut() = GPUBufferState::Unmapped;
}
/// https://gpuweb.github.io/gpuweb/#dom-gpubuffer-destroy
fn Destroy(&self) {
match *self.state.borrow() {
GPUBufferState::Mapped => {
self.Unmap();
},
_ => {},
};
self.channel
.0
.send(WebGPURequest::DestroyBuffer(self.buffer))
.unwrap();
*self.state.borrow_mut() = GPUBufferState::Destroyed;
}
/// https://gpuweb.github.io/gpuweb/#dom-gpuobjectbase-label
fn GetLabel(&self) -> Option<DOMString> {
self.label.borrow().clone()
}
/// https://gpuweb.github.io/gpuweb/#dom-gpuobjectbase-label
fn SetLabel(&self, value: Option<DOMString>) {
*self.label.borrow_mut() = value;
}
}
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